Meshiuma (メシウマ) is a Japanese
slang word originating from 2channel, which is a shortened version of 他人の不幸でメシがうまい (tanin no fukou de meshi ga umai), whose meaning is "Other
people's misfortunes make the food tasty", which is a metaphor for "getting aroused from the misfortunes of others", thus it's the Japanese word for "
schadenfreude".